What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    How can I avoid duplicated emails?

    Asked by embajadoresizettle on August 26, 2015 at 12:33 PM

    Some users register twice or more, how can I prevent that?

    Is there a configuration about that?

    Thanks a lot!

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    JotForm Support

    Answered by Charlie on August 26, 2015 at 02:09 PM

    If you want your users to submit once, there's a couple of ways to do that.

    Let's say, you want charlie@yahoo.com to only submit once, you can use the option unique question in the form limits and set it to the email field. Here's a guide on how to do that: https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question 

    If you want to limit per IP or browser session, you can follow this guide: https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form 

    Do let us know if you need more information on this.